| commit | 0f672f6c0b52b7b0700b0915c72b540721af4465 | [log] [tgz] |
|---|---|---|
| author | David Brazdil <dbrazdil@google.com> | Tue Dec 10 10:32:29 2019 +0000 |
| committer | David Brazdil <dbrazdil@google.com> | Tue Dec 10 19:03:18 2019 +0000 |
| tree | 85c8cba019caa205e4f8920d72d93f6d6deaf29c | |
| parent | 3a0ad55d848b50499b68d7141d4eca997fce28ef [diff] [blame] |
Update Linux to v5.4.2 Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/lib/dump_stack.c b/lib/dump_stack.c index 5cff72f..33ffbf3 100644 --- a/lib/dump_stack.c +++ b/lib/dump_stack.c
@@ -106,7 +106,12 @@ was_locked = 1; } else { local_irq_restore(flags); - cpu_relax(); + /* + * Wait for the lock to release before jumping to + * atomic_cmpxchg() in order to mitigate the thundering herd + * problem. + */ + do { cpu_relax(); } while (atomic_read(&dump_lock) != -1); goto retry; }